18505

Appears in sequences

• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 16 (most significant digit on right).at n=28A029509
• Denominators of continued fraction convergents to sqrt(183).at n=10A041339
• Third row of Pascal-(1,2,1) array A081577.at n=16A081583
• Let f(k) = exp(Pi*sqrt(k)); sequence gives numbers k such that ceiling(f(k)) - f(k) < 1/10^3.at n=29A127022
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.at n=7A151131
• Number of partitions of n not containing the number of distinct parts as a part.at n=39A239946
• Position within the triangular array A226314(n)/A054531(n) of rationals x/y such that x < y, gcd(x,y)=1, x+y odd and for the least y, {x, y} are integers such that x*y(y^2-x^2)/A006991(n) is a perfect square.at n=24A242061
• Number of length n+2 0..6 arrays with some pair in every consecutive three terms totalling exactly 6.at n=4A245867
• T(n,k)=Number of length n+2 0..k arrays with some pair in every consecutive three terms totalling exactly k.at n=49A245869
• Number of length 5+2 0..n arrays with some pair in every consecutive three terms totalling exactly n.at n=5A245874
• Numbers n such that A003146(n) = floor(alpha^3*n)+1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=20A278353
• Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A303244
• Triangle read by rows: T(n,k) (n >= 5, 4 <= k <= n-1) = number of lattice 3-polytopes of width larger than 1, size n, and k vertices.at n=17A319958